Work

Optical determination of motility forces in human spermatozoa with laser tweezers

Year: 1996

Type: conference-paper

Abstract: Laser tweezers may act as optical force transducers. We report on the determination of intrinsic motility forces of human spermatozoa by employing an 800 nm optical trap. The cellular forces were calculated from calibrated trapping forces. The determination of trapping forces based on a hydrodynamic model for ellipsoidal specimens, the measurement of the minimum laser power required to confine a single cell in the trap, and the calculation of viscus forces during the movement of optically trapped sperm heads through a laminar fluid. A mean motility force of 44 plus or minus 24 pN was calculated for spermatozoa of healthy donors.

Source: Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

DOI: 10.1117/12.260803

Authors: Karsten Koenig, Lars O. Svaasand, Yona Tadir, Bruce J. Tromberg, Michael W. Berns

Institutions: Norwegian University of Science and Technology, Beckman Laser Institute and Medical Clinic

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W2066316108

FWCI:

Cites: 10

Cited by: 2

Related to: 10